The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 16, 2019
Filed:
Jul. 22, 2016
Crrc Zhuzhou Institute Co., Ltd., Zhuzhou, Hunan, CN;
Jianghua Feng, Hunan, CN;
Junfeng Xu, Hunan, CN;
Yuliang Wen, Hunan, CN;
Jing Shang, Hunan, CN;
Jiade Huang, Hunan, CN;
Xiaofan Zeng, Hunan, CN;
Zhaoyang Zhang, Hunan, CN;
Hanfeng Zheng, Hunan, CN;
Xiong Liu, Hunan, CN;
Yaping He, Hunan, CN;
CRRC ZHUZHOU INSTITUTE CO., LTD., Zhuzhou, Hunan, CN;
Abstract
A method and a system for correcting an initial zero position deviation are provided, which is applied to a permanent magnet synchronous motor and a resolver. The method includes: driving a rotor of the permanent magnet synchronous motor to rotate at a constant speed; acquiring counter electromotive forces of a stator of the permanent magnet synchronous motor and a position of a rotor of the resolver; calculating a space vector phase angle θbased on the counter electromotive forces; acquiring a rotation angle θmeasured by the resolver; calculating an installation deviation Δθ corresponding to the space vector phase angle θand the rotation angle θ; and adjusting a position of the resolver until the installation deviation Δθ meets a precision requirement.